Questions about compression #s

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02-18-2009, 12:49 PM

zmaniv

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Questions about compression #s

In California we are only able to get 91 octane fuel is this going to be a problem if I choose to run the JE pistons and Mori stage 1 cams?

02-19-2009, 03:17 PM

motojoe

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No, because you can buy a can of higher octane(race fuel) and mix it with your pump gas like motocrossers. We do it all the time. Some guys I know have 13:1 + comp. ratios.

02-20-2009, 02:35 PM

zmaniv

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Thanks motojoe I didn't want to have to pull out octane booster everytime I filled up.

02-22-2009, 06:05 PM

zmaniv

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Anyone else have any feedback?
I would like to keep the bike streetable (not have to carry around octane booster).

02-22-2009, 06:24 PM

cliby

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I have Moriwaki HC pistons and stage 1 cams and full exhaust and rejetted. Not uncommonly the highest octane I can get is 91 - runs fine, I don't hear any detonation, plugs look fine.